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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Improvement of quality, function and transplantation outcomes of pancreatic islets using RNA interference
 Kosinová, Lucie ; Kříž, Jan (advisor) ; Štechová, Kateřina (referee) ; Petrák, Ondřej (referee)
Transplantation of insulin producing tissue is the only therapeutic method so far allowing type 1 diabetic patients to achieve long-term independence of insulin administration. Transplantation of isolated pancreatic islets (PI) into liver represents a safer but less effective alternative to whole-organ transplantation. This is caused by a significant loss of transplanted islets within a short time after transplantation due to the instant blood-mediated inflammatory reaction (IBMIR). This reaction is triggered by molecules of tissue factor, abundantly expressed on the surface of PI cells. Tissue factor activates directly the coagulation pathway leading to platelet aggregation, complement activation, and infiltration of islet graft by leukocytes which results in a destruction of up to 60 % of transplanted tissue, and a formation of ischemic areas of downstream lying liver tissue. Tissue factor also stimulates angiogenesis which makes it necessary for revascularization of PI after transplantation. Inhibition of tissue factor gene in isolated PI using RNA interference provides an opportunity for short-term suppression of tissue factor expression, leading to protection of PI in the early post-transplantation period without hindering the connection of capillaries to the recipient vascular system later...
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